<template>
    <!-- 展示外部图标 -->
    <div
        v-if="isExternal"
        :style="styleExternalIcon"
        :class="className"
        class="svg-external-icon svg-icon"
    ></div>
    <!-- 展示内部部图标 -->
    <svg class="svg-icon" :class="className" aria-hidden="true" v-else>
        <use :xlink:href="iconName"></use>
    </svg>
</template>

<script setup>
import { isExternal as external } from '@/utils/validate';
import { computed, defineProps } from 'vue';
const props = defineProps({
  // icon 图标
  icon: {
    type: String,
    required: true
  },
  // 图标类名
  className: {
    type: String,
    default: ''
  }
});
/**
 *判断是否为外部图标
 */
const isExternal = computed(() => external(props.icon));
/***
 * 外部图标样式
 */
const styleExternalIcon = computed(() => ({
  mask: `url(${props.icon}) no-repeat 50% 50%`,
  '-webkit-mask': `url(${props.icon}) no-repeat 50% 50%`
}));
/***
 * 项目内图标
 */
const iconName = computed(() => `#icon-${props.icon}`);
</script>

<style lang="scss" scope>
.svg-icon {
    width: 1em;
    height: 1em;
    vertical-align: -0.15em;
    fill: currentColor;
    overflow: hidden;
}
.svg-external-icon {
    background-color: currentColor;
    mask-size: cover !important;
    display: inline-block;
}
</style>
